Parallel Error Abnormal Exit!

Morice · April 21, 2020, 22:10

I am attempting to run ANSYS 2019 R1 Fluent in parallel on 8 cores but the simulation runs for 2 to 4 hours then Fluent disappears logging the following errors:

Error [node 0] [time 4/22/20 0:18] Abnormal Exit!

Error [node 1] [time 4/22/20 0:18] Abnormal Exit!

Error [node 2] [time 4/22/20 0:18] Abnormal Exit!

Error [node 3] [time 4/22/20 0:18] Abnormal Exit!

Error [node 4] [time 4/22/20 0:18] Abnormal Exit!

Error [node 5] [time 4/22/20 0:18] Abnormal Exit!

Error [node 6] [time 4/22/20 0:18] Abnormal Exit!

Error [node 7] [time 4/22/20 0:18] Abnormal Exit!

Error [node 999999] [time 4/22/20 0:18] Abnormal Exit!

What could be the issue?

I have attempted all the solutions suggested on this platform for problems that are almost similar but nothing seems to work.

Thank you very much. Much appreciated

vinerm · April 22, 2020, 05:24

This is very common error. However, if the case did not diverge or if there is no UDF that could be causing this, then most likely reason is the network. The network across multiple nodes is unstable. If it is a single computer with multiple cores, then it cannot be network but resource unavailability could still cause this issue.

Morice · April 22, 2020, 07:59

Thank you very much for your response. Much appreciated.
I run Fluent on a single computer with multiple cores, 4 cores,8 threads. Your hypothesis that it may be resource unavailability may be correct. Though I was able to deduce that this often occurred when the internet connection to the computer was interrupted. The last two simulations I ran, the computer was offline and the simulations were successful. This is just a theory, still uncertain if this is the actual root cause.

vinerm · April 22, 2020, 08:02

Yes, the net connection disruption or connection changes the settings. So, that is the reason.

Morice · April 22, 2020, 10:20

Doing another simulation run with the computer offline to see if there will be any issues.

Will do an update on the outcome.

Again, thank you for your response, much appreciated.

mz_uon · June 20, 2022, 06:56

Hello Morice
Is the error due to a network problem or memory allocation?
I have the same issue.

Thanks

Quote:

Originally Posted by Morice

Doing another simulation run with the computer offline to see if there will be any issues.

Will do an update on the outcome.

Again, thank you for your response, much appreciated.

April 21, 2020, 22:10	Parallel Error Abnormal Exit!	#1
Morice Member Join Date: Oct 2019 Posts: 35 Rep Power: 7	I am attempting to run ANSYS 2019 R1 Fluent in parallel on 8 cores but the simulation runs for 2 to 4 hours then Fluent disappears logging the following errors: Error [node 0] [time 4/22/20 0:18] Abnormal Exit! Error [node 1] [time 4/22/20 0:18] Abnormal Exit! Error [node 2] [time 4/22/20 0:18] Abnormal Exit! Error [node 3] [time 4/22/20 0:18] Abnormal Exit! Error [node 4] [time 4/22/20 0:18] Abnormal Exit! Error [node 5] [time 4/22/20 0:18] Abnormal Exit! Error [node 6] [time 4/22/20 0:18] Abnormal Exit! Error [node 7] [time 4/22/20 0:18] Abnormal Exit! Error [node 999999] [time 4/22/20 0:18] Abnormal Exit! What could be the issue? I have attempted all the solutions suggested on this platform for problems that are almost similar but nothing seems to work. Thank you very much. Much appreciated

April 22, 2020, 05:24	Error	#2
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 36	This is very common error. However, if the case did not diverge or if there is no UDF that could be causing this, then most likely reason is the network. The network across multiple nodes is unstable. If it is a single computer with multiple cores, then it cannot be network but resource unavailability could still cause this issue. hakari likes this. __________________ Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.

April 22, 2020, 08:02	Internet Connection	#4
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 36	Yes, the net connection disruption or connection changes the settings. So, that is the reason. __________________ Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.

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April 22, 2020, 07:59		#3
Morice Member Join Date: Oct 2019 Posts: 35 Rep Power: 7	Thank you very much for your response. Much appreciated. I run Fluent on a single computer with multiple cores, 4 cores,8 threads. Your hypothesis that it may be resource unavailability may be correct. Though I was able to deduce that this often occurred when the internet connection to the computer was interrupted. The last two simulations I ran, the computer was offline and the simulations were successful. This is just a theory, still uncertain if this is the actual root cause.

April 22, 2020, 10:20		#5
Morice Member Join Date: Oct 2019 Posts: 35 Rep Power: 7	Doing another simulation run with the computer offline to see if there will be any issues. Will do an update on the outcome. Again, thank you for your response, much appreciated.